could download
Regular verb: download - downloaded- downloaded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could download
you could download
she could download
we could download
you could download
they could download 	I could be downloading
you could be downloading
she could be downloading
we could be downloading
you could be downloading
they could be downloading	I could have downloaded
you could have downloaded
she could have downloaded
we could have downloaded
you could have downloaded
they could have downloaded	I could have been downloading
you could have been downloading
she could have been downloading
we could have been downloading
you could have been downloading
they could have been downloading	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not download
you could not download
she could not download
we could not download
you could not download
they could not download 	I could not be downloading
you could not be downloading
she could not be downloading
we could not be downloading
you could not be downloading
they could not be downloading	I could not have downloaded
you could not have downloaded
she could not have downloaded
we could not have downloaded
you could not have downloaded
they could not have downloaded	I could not have been downloading
you could not have been downloading
she could not have been downloading
we could not have been downloading
you could not have been downloading
they could not have been downloading	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I download?
could you download?
could she download?
could we download?
could you download?
could they download? 	could I be downloading?
could you be downloading?
could she be downloading?
could we be downloading?
could you be downloading?
could they be downloading? 	could I have downloaded?
could you have downloaded?
could she have downloaded?
could we have downloaded?
could you have downloaded?
could they have downloaded? 	could I have been downloading?
could you have been downloading?
could she have been downloading?
could we have been downloading?
could you have been downloading?
could they have been downloading? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not download?
could you not download?
could she not download?
could we not download?
could you not download?
could they not download? 	could I not be downloading?
could you not be downloading?
could she not be downloading?
could we not be downloading?
could you not be downloading?
could they not be downloading? 	could I not have downloaded?
could you not have downloaded?
could she not have downloaded?
could we not have downloaded?
could you not have downloaded?
could they not have downloaded? 	could I not have been downloading?
could you not have been downloading?
could she not have been downloading?
could we not have been downloading?
could you not have been downloading?
could they not have been downloading?